Lazy . story and art. Heiyi strive for his brother ! Chapter 30 . heiyi strivefor my brother . . The narrator tells us that he will be his sister's brother, Cai Mi, or sister-in-law. Cai Mi is a beautiful teenager who has just returned from a summer vacation at the home of wangzi, the wealthy landowner. He is a member of the student council, and he and Cai Mi have been spending a lot of time together. When Cai Mi asks her about the upcoming sports meeting, she tells him that she wants him to take more responsibility for the meeting, but he says that he can't because he is a first-year student.